Index: GZIPDecodingInterceptor.java
===================================================================
--- GZIPDecodingInterceptor.java	(revision 1368)
+++ GZIPDecodingInterceptor.java	(working copy)
@@ -31,13 +31,15 @@
       if (encoding != null && encoding.toString().equalsIgnoreCase("gzip"))
       {
          InputStream old = context.getInputStream();
-         context.setInputStream(new GZIPInputStream(old));
+         FinishableGZIPInputStream gzipInputStream = new FinishableGZIPInputStream(old);
+         context.setInputStream(gzipInputStream);
          try
          {
             return context.proceed();
          }
          finally
          {
+            gzipInputStream.finish();
             context.setInputStream(old);
          }
       }
@@ -46,4 +48,18 @@
          return context.proceed();
       }
    }
+
+   /** extension of {@link GZIPInputStream} which adds a finish method to ends the inflation; necessary to release native code pointers */
+   private static class FinishableGZIPInputStream extends GZIPInputStream
+   {
+      public FinishableGZIPInputStream(final InputStream is) throws IOException
+      {
+         super(is);
+      }
+
+      void finish()
+      {
+         inf.end(); // make sure on finish the inflater's end() is called to release the native code pointer
+      }
+   }
 }
Index: GZIPEncodingInterceptor.java
===================================================================
--- GZIPEncodingInterceptor.java	(revision 1368)
+++ GZIPEncodingInterceptor.java	(working copy)
@@ -30,7 +30,7 @@
       if (encoding != null && encoding.toString().equalsIgnoreCase("gzip"))
       {
          OutputStream old = context.getOutputStream();
-         GZIPOutputStream gzipOutputStream = new GZIPOutputStream(old);
+         CustomGZIPOutputStream gzipOutputStream = new CustomGZIPOutputStream(old);
          context.setOutputStream(gzipOutputStream);
          try
          {
@@ -48,4 +48,20 @@
          context.proceed();
       }
    }
+
+   /** extension of {@link GZIPOutputStream} which also ends the deflation on finish; necessary to release native code pointers */
+   private static class CustomGZIPOutputStream extends GZIPOutputStream 
+   {
+      public CustomGZIPOutputStream(OutputStream os) throws IOException
+      {
+         super(os);
+      }
+
+      @Override
+      public void finish() throws IOException
+      {
+         super.finish();
+         def.end(); // make sure on finish the deflater's end() is called to release the native code pointer
+      }
+   }
 }